diff --git a/rspec-tools/rspec_tools/validation/rule-metadata-schema.json b/rspec-tools/rspec_tools/validation/rule-metadata-schema.json
index b1f601a7cb..3a83234db4 100644
--- a/rspec-tools/rspec_tools/validation/rule-metadata-schema.json
+++ b/rspec-tools/rspec_tools/validation/rule-metadata-schema.json
@@ -77,6 +77,13 @@
               "$ref": "#/definitions/time"
             }
           }
+        }, {
+          "additionalProperties": false,
+          "properties": {
+            "func": {
+              "const": "Unpredictable"
+            }
+          }
         }
       ]
     },
@@ -231,7 +238,7 @@
   "definitions": {
     "time": {
       "type": "string",
-      "pattern": "^[ ]*[0-9]+[ ]*(mn|min|h|d)$"
+      "pattern": "^[ ]*[1-9][0-9]*[ ]*(mn|min|h|d)$"
     }
   }
 }
diff --git a/rules/S1134/metadata.json b/rules/S1134/metadata.json
index 2c0990d071..983e09c4da 100644
--- a/rules/S1134/metadata.json
+++ b/rules/S1134/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
     "cwe"
diff --git a/rules/S1135/metadata.json b/rules/S1135/metadata.json
index cc20189e91..1eb1c66ca8 100644
--- a/rules/S1135/metadata.json
+++ b/rules/S1135/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
     "cwe"
diff --git a/rules/S1239/cfamily/metadata.json b/rules/S1239/cfamily/metadata.json
index ddeff24236..3b6cbd456e 100644
--- a/rules/S1239/cfamily/metadata.json
+++ b/rules/S1239/cfamily/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S124/metadata.json b/rules/S124/metadata.json
index 64d71fb7ca..a185453e1b 100644
--- a/rules/S124/metadata.json
+++ b/rules/S124/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S1251/cfamily/metadata.json b/rules/S1251/cfamily/metadata.json
index 88103d07c5..3959829934 100644
--- a/rules/S1251/cfamily/metadata.json
+++ b/rules/S1251/cfamily/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S1256/cfamily/metadata.json b/rules/S1256/cfamily/metadata.json
index 27ef87b672..4106529b67 100644
--- a/rules/S1256/cfamily/metadata.json
+++ b/rules/S1256/cfamily/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S1267/cfamily/metadata.json b/rules/S1267/cfamily/metadata.json
index bd0fc4ba94..c9e7381472 100644
--- a/rules/S1267/cfamily/metadata.json
+++ b/rules/S1267/cfamily/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S1272/cfamily/metadata.json b/rules/S1272/cfamily/metadata.json
index fc4c8d17e8..1813ffeb08 100644
--- a/rules/S1272/cfamily/metadata.json
+++ b/rules/S1272/cfamily/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S1489/abap/metadata.json b/rules/S1489/abap/metadata.json
index eee1939637..340b2c4021 100644
--- a/rules/S1489/abap/metadata.json
+++ b/rules/S1489/abap/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S1490/abap/metadata.json b/rules/S1490/abap/metadata.json
index 50a8c7245d..c89369cd3d 100644
--- a/rules/S1490/abap/metadata.json
+++ b/rules/S1490/abap/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S1509/abap/metadata.json b/rules/S1509/abap/metadata.json
index 7a3c8141c9..b34f80504b 100644
--- a/rules/S1509/abap/metadata.json
+++ b/rules/S1509/abap/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S1681/cobol/metadata.json b/rules/S1681/cobol/metadata.json
index 456a4485c2..29b3ff0b44 100644
--- a/rules/S1681/cobol/metadata.json
+++ b/rules/S1681/cobol/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S1914/cfamily/metadata.json b/rules/S1914/cfamily/metadata.json
index ff3faa785e..ae3305be9e 100644
--- a/rules/S1914/cfamily/metadata.json
+++ b/rules/S1914/cfamily/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S2113/java/metadata.json b/rules/S2113/java/metadata.json
index 72b1a5246e..a9e173d34b 100644
--- a/rules/S2113/java/metadata.json
+++ b/rules/S2113/java/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
     "bug"
diff --git a/rules/S2253/metadata.json b/rules/S2253/metadata.json
index aa2f2793bf..802d041c06 100644
--- a/rules/S2253/metadata.json
+++ b/rules/S2253/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S2260/cfamily/metadata.json b/rules/S2260/cfamily/metadata.json
index ded19e10bb..b4f697c8b0 100644
--- a/rules/S2260/cfamily/metadata.json
+++ b/rules/S2260/cfamily/metadata.json
@@ -1,7 +1,6 @@
 {
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "sqKey": "ParsingError"
 }
diff --git a/rules/S3417/xml/metadata.json b/rules/S3417/xml/metadata.json
index d16968a592..8fe75f2d4c 100644
--- a/rules/S3417/xml/metadata.json
+++ b/rules/S3417/xml/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
     "maven"
diff --git a/rules/S3546/java/metadata.json b/rules/S3546/java/metadata.json
index 23564efddf..e3f0c20a88 100644
--- a/rules/S3546/java/metadata.json
+++ b/rules/S3546/java/metadata.json
@@ -3,8 +3,7 @@
   "type": "BUG",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
     "denial-of-service"
diff --git a/rules/S3575/csharp/metadata.json b/rules/S3575/csharp/metadata.json
index 1ebf513423..61091d6fea 100644
--- a/rules/S3575/csharp/metadata.json
+++ b/rules/S3575/csharp/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
     "finding",
diff --git a/rules/S3688/metadata.json b/rules/S3688/metadata.json
index c0651fe0d4..cbc3f8fd32 100644
--- a/rules/S3688/metadata.json
+++ b/rules/S3688/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S3938/cobol/metadata.json b/rules/S3938/cobol/metadata.json
index 261e5eba31..346b9296be 100644
--- a/rules/S3938/cobol/metadata.json
+++ b/rules/S3938/cobol/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S4011/java/metadata.json b/rules/S4011/java/metadata.json
index 256a16d069..ea140cceea 100644
--- a/rules/S4011/java/metadata.json
+++ b/rules/S4011/java/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S4439/javascript/metadata.json b/rules/S4439/javascript/metadata.json
index 4f5c4c7d87..470a5138ed 100644
--- a/rules/S4439/javascript/metadata.json
+++ b/rules/S4439/javascript/metadata.json
@@ -3,8 +3,7 @@
   "type": "BUG",
   "status": "closed",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
     "antipattern",
diff --git a/rules/S5639/cfamily/metadata.json b/rules/S5639/cfamily/metadata.json
index bb3fd9912c..29e50a41f1 100644
--- a/rules/S5639/cfamily/metadata.json
+++ b/rules/S5639/cfamily/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
 
diff --git a/rules/S6212/java/metadata.json b/rules/S6212/java/metadata.json
index f93c9e8022..de0c76d4d6 100644
--- a/rules/S6212/java/metadata.json
+++ b/rules/S6212/java/metadata.json
@@ -3,8 +3,7 @@
   "type": "CODE_SMELL",
   "status": "ready",
   "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "0min"
+    "func": "Unpredictable"
   },
   "tags": [
     "java10"